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Hardware description - MULTIFACE 128I make schematic of MULTIFACE 128 (v36) from PCB layers downloaded from WOS. But all PCB layers on WOS contain some bugs, absent signals, etc.. Now …
... ) of values writed to port #7FFD. Last writed data(only ... writed to this port:
- OUT #7FFD (addressing 0xxxxxxx xxxxxx0x ... ZX rom). Reading data from this port is unused/not ... contain bug and port data are rewrited also after reading port 7FFD).
- ... -
what extra port for extra memory ? (256K, 512K, 1024K, etc.)I know that Pentagon uses some extra bits from port 7FFD for extra memory pging: - for 512K model, bit 6 & 7 of port 7FFD - for 1024K model, bit 5, 6…
... some extra bits from port 7FFD for extra memory pging:< ... bit 6 & 7 of port 7FFD
- for 1024K model ... 5, 6 & 7 of port 7FFD
I ... to lock the port 7FFD (on +128K/+2) and 7FFD & 1FFD ... sure I will never use port 7FFD for this.
RAM paging and port usageDear users and developers, I'm just trying to find some detail information about RAM paging on the Spectrum 128 and later models, especially those a…
... /> Spectrum 128k and +2:
port 7ffd bits 0..2 select one ... bits 1 and 2 of port 1ffd, which is called ... Scorpion ZS 256k:
if port 1ffd bit 4 is reset ... bits 6 and 7 of port 7ffd are also used to select ... the bits 0..2 of port 7ffd. My proposal would be ...RUSSIAN SOFTWARE and real ZXRussian ZX games is writed on russian ZX clones and support hardware feature TURBO OFF ( for ZX clone ZS SCORPION ). Russian ZX clone ZS SCORPION use…
... for memory paging and reading this ports is used ... hardware bug - after read port #7FFD will ZX crash (data from ... is writed to paging port).
Read port #7FFD = on ZX128/+2 ... 2 use paging port #7FFD only. Hardware use incomplette port adressation (accept ...Reading Kempston MouseI have been looking at Velesoft's design for the Kempston Mouse interface and am puzzled over the description for reading port 64223 (the Kempston mo…
... the description for reading port 64223 (the Kempston mouse port).
Velesoft ... page says:
mouse buttons port 64223/15071:
===============================
D0 ... /reference/peripherals.htm[/url], the port should return:
...Emulation of ZX Spectrum 128+2 (grey)Please read this thread: [url]http://www.worldofspectrum.org/forums/showthread.php?t=35523[/url] result: exist 3 (or more) versions of grey ZX Spect…
... bug - zx not crash after reading from port 7FFD.
Emulator REALSPECTRUM ... mode crash after PRINT IN 7FFD, but ZX SPIN not crash ...Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…
... -dos rom set 128rom on port #7FFD. (on some new betadisc clones ... is set (only writing to port #7FFD work always). This feature enable ... )
Control port #FF(255) for reading
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bits 0 ...Hardware description - MULTIFACE 3[B]Hardware description - MULTIFACE 3[/B] This is description of MF3 clone, because I can't find more about original interface. Schematic and PAL ch…
... memory disconnect + disabled reading of ports #xx3F(reading of this ports ... . In same time is enable reading of ports #xx3F.
... ) + enable MAGIC button + disable reading of ports #xx3F
OUT ... return last data writed to port #7FFD
If you disable ...Strange keyboard port reads on 48+Hi all, I don't know whether it was already discussed (I also searched forum, but there are too much of results searching "48k keyboard" so I didn't…
... on 48k+ keyboard and read port EFFE (keys 6-0) I ... address where is the program reading port as on some addresses it ... test program, which repeatedly reads port EFFE (on different addresses) and ...Paging MemoryAny idea why this short piece of code doesnt work, just crashes. I am just messing with paging memory in and out (not achived this yet) and reading t…
... 214821]First problem is that port $7ffd is not readable. Second ... HAL chip equation and port #7FFD is write too in ... paging(OUT 32765,48 ), 128 port reading / writing is ignored. On ... This GAL chip disable 128port reading (write only) and if signal ...Reading Kempston MouseI have been looking at Velesoft's design for the Kempston Mouse interface and am puzzled over the description for reading port 64223 (the Kempston mo…
... ) 1xxxx1x0 11011111 ( return data of port #7FFD )
I presume this ... present by writing something to port #7ffd and reading to see if the ...Reading Kempston MouseI have been looking at Velesoft's design for the Kempston Mouse interface and am puzzled over the description for reading port 64223 (the Kempston mo…
... ) 1xxxx1x0 11011111 ( return data of port #7FFD )
I presume ... present by writing something to port #7ffd and reading to see if the ... last value writed to paging port #7FFD (32765) on ZX Spectrum ... read real state of paging port !!! (all 8 bits = page ...What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... GAL also disable reading from port 7FFD (ZX ignore reading and return floating bus ... /OTIR will fast). Adressation of port 7FFD can be used as on ...What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... GAL also disable reading from port 7FFD (ZX ignore reading and return ... port #7FFD (same as on ZX128+2A/+3)
- reading of port #7FFD ... only port #7FFD is enable (port #1FFD not exist). Port #7FFD use ... not crash after read port #7FFD). All ports with A0 ...contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …
[QUOTE=BiNMaN;524939]from reading your work on the 128ke ... of port #7FFD (same as on ZX128+2A/+3)
- reading of port #7FFD is ...contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …
... of port #7FFD (same as on ZX128+2A/+3)
- reading of port #7FFD is ...contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …
... of port #7FFD (same as on ZX128+2A/+3)
- reading of port #7FFD is ...GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…
... value sent to OUT 32765 (#7ffd)"
so why is ... ),a ; send pattern 1 to port 7ffd
ld b,0xfe
in a,(c) ; acc=port fedf
ld hl,0 ... />
test is needed because reading the mouse status like this ...Emulation of ZX Spectrum 128+2 (grey)Please read this thread: [url]http://www.worldofspectrum.org/forums/showthread.php?t=35523[/url] result: exist 3 (or more) versions of grey ZX Spect…
... ).[/QUOTE]
Rading of port 7FFD on ZX128 and grey +2 ... will use uncomplette adressation of port 7FFD:
IN 16381 is fast ... /> Last version of +2 ignore reading from port 7FFD - On this models run ...'rain' error on British Spectrums?Hi guyz. Is there any scheme of 'umbrella' modification for British Spectrums? I mean the mod to avoid 'raining' effect, visible on this video: […
... rain/snow effect and ignore reading of port #7FFD)Schematic of MULTIFACE 128Exist schematic of Multiface 128 ? I find on WOS only pictures of PCB layers. I mix both layers for possibility make schematic from picture, but it's…
... br /> - any writing to paging port 7FFD (accept only A15=0 + A1 ... to internal register.
- read port #BF = connect MF128 memory instead ... to log.1. Reading of this port can connect MF128 memory ... in any time.
- read port #3F = disconnect MF128 memory, ...Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... HAL10H8( or PAL10H8 ). This is port decoder and memory controller.
port 7FFD (write floating bus data)
reading from port 7FFD is also good, but ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... ) problems. It might be worth reading the Z80 emulator manual.[/QUOTE ... anything regarding the snooping on port #7FFD that would be required (in ...Upgrade ZX Spectrum 128,+2,+2a/b,+3[B]1. Debugging RD #7FFD ZX Spectrum 128,+2:[/B] [url]http://zx.clan.su/forum/8-121-1#795[/url]
... reading of paging port.
Existing ZX software not support reading of port 7FFD ... 7FFD return to data bus true value of port 7FFD. This enable true reading port ... paging port.Upgrade ZX Spectrum 128,+2,+2a/b,+3[B]1. Debugging RD #7FFD ZX Spectrum 128,+2:[/B] [url]http://zx.clan.su/forum/8-121-1#795[/url]
... can fix more bugs. Reading from port 7FFD is not so big problem ... list of games/software using reading from port 7FFD or 1FFD ?Upgrade ZX Spectrum 128,+2,+2a/b,+3[B]1. Debugging RD #7FFD ZX Spectrum 128,+2:[/B] [url]http://zx.clan.su/forum/8-121-1#795[/url]
[QUOTE=velesoft;689973]Exist any list of games/software using reading from port 7FFD or 1FFD ?[/QUOTE]
Only Scorpion ProfROM. Some of the software forcibly disable the TURBO mode all known methods.Ate Bit Platform GameIMHO [URL="http://worldofspectrum.org/forums/showthread.php?t=28997"]this game[/URL] deserves to be preserved as "never released". It's available as…
Nice game, but contain bad code (bugs). During play game can reset and in menu use incorrect port adress for reading keyboard (use I/O adress with A1=0 and on ZX128/+2 write value #FF to paging port 7FFD)Ate Bit Platform GameIMHO [URL="http://worldofspectrum.org/forums/showthread.php?t=28997"]this game[/URL] deserves to be preserved as "never released". It's available as…
... in menu use incorrect port adress for reading keyboard (use I/O ... write value #FF to paging port 7FFD)[/QUOTE]
These bugs ...esxDOS v0.8.5 released (with TR-DOS emulator)Yup, you read right! Now with TR-DOS emulation! More info and download here: [url]http://www.esxdos.org/[/url] Enjoy :)
... ?
Also with this reading TRD disc images does it ... start snapshot change value of port 7FFD. Snapshot loading is in ESXDOS ...Upgrade ZX Spectrum 128,+2,+2a/b,+3[B]1. Debugging RD #7FFD ZX Spectrum 128,+2:[/B] [url]http://zx.clan.su/forum/8-121-1#795[/url]
... the error occurred when reading from the port #7FFD in computers ZX Spectrum ... read the status of the port #7FFD. Jumper JP1 must be broken ...
